50 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL.84 



considers to be the probable cause of club-root in cabbages. This 

 report is very short, covering only 29 pages, and is illustrated with 

 three small woodcuts. 



The eleventh report takes up the onion fly, the cabbage fly, the 

 striped flea-beetle, the cabbage aphis, the radish fly and worm, the 

 hairy flea-beetle and wireworms, the bulk of the report being filled 

 with a consideration of the last named insects. The report is again 

 short, and occupies about 55 pages. 



The twelfth report is 45 pages long, and treats of the bufifalo tree- 

 hopper, the yellow-lined tree-hopper, the flowery primrose moth, 

 the Ohio currant sawfly, the currant-worm, the bulk of the report 

 being devoted to the last named insect. This again being an imported 

 species, he hints at the advisability of introducing its natural enemies. 



The thirteenth report, published in 1870, is 70 pages in length, and 

 carefully considers the bean aphis, the black-lined plant-bug, the 

 lilac measure-worm, the imported cabbage butterfly, and the native 

 cabbage butterfly, principal attention being given to the newly im- 

 ported insect. 



The fourteenth report (1871) is very short, covering only 26 pages. 

 It considers the scallop-shell moth whose larva eats the leaves of 

 cherry trees, the raspberry beetle, the lettuce earth-louse, the wood 

 tick and certain other ticks, and the " toothache mite " ; also the 

 earwig fly. 



Benjamin Dann Walsh 



One of the best articles (the authorship of which is certain) that 

 Riley ever wrote was his "In Memoriam " of Walsh, pul:)lished as 

 the leading article of The American Entomologist, Volume 2, No. 3, 

 January, 1870. Walsh was a very talented and forceful man, and the 

 importance of his work concerning American economic entomology, 

 although it lasted only 1 1 years and did not begin until he was 50 

 years of age, was really ejx)ch-making. It has been said often that 

 modern American economic entomology began with C. V' . Riley, but 

 after Walsh's work is carefully considered we cannot fail to ac- 

 knowledge that it began with him. He had a keen, analytical mind, 

 a very broad knowledge of biology in general, was one of the most 

 entertaining and forceful writers who ever handled a pen, and was a 

 man of much culture. 



He was born in England in 1808; went to Cambridge University, 

 where he knew and worked with Charles Darwin. He was a classical 

 student of high attainments, and wrote a metrical translation of the 

 comedies of Aristophanes, of which one volume only was published. 



